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Which organization declared Sundarban as 'World Heritage Site'? Correct Answer UNESCO World Bank group = IBRD + IDA + ICSID + IFC + MIGA

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Which one is the database software? Correct Answer ORACLE A database is an organized collection of data, generally stored and accessed electronically from a computer system. Where databases are more complex they are often developed using formal design and modeling techniques. Database software is a Oracle.

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Which one is not a word processing software? Correct Answer MS Excel Microsoft Excel - এটিকে কেউ কেউ স্প্রেডশিট সফটওয়্যার বলে থাকেন। বিভিন্ন হিসাব সংক্রান্ত কাজের জন্য মাইক্রোসফট এক্সেল ব্যবহার করা হয়। MS WORD, WordPerfect এবং WordStar - এই তিনটিই Word Processing Software.

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What percent of 25 is 0.20? Correct Answer 0.8 let x% of 25 is 0.2 so, (x/100) × 25 = 0.2 so, x = 0.8

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In a sugar-water solution, the ratio of water to sugar is 8:3. If you add 2 Kgs of sugar, the ratio become 2:1. What was the amount of sugar in the original solution? Correct Answer 6 W : S = 8 : 3 W/S = 8/3 3W = 8S Again, W/(s + 2) = 2/1 1W = 2s + 4 3W = 6S + 12 8S = 6S + 12 S = 6

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Find the average of all whole number 1 and 100 that end in 3. Correct Answer None of them The numbers are 3, 13, 23.33.......93So difference between each number is same. This series in AP.The avarage formula for AP is (first + last term)/2Therefore the answer is (3 + 93)/2 = 48.

Explanation:

A pen was sold at 15% loss. If the selling price was Tk. 8 more, than the seller could have made a profit of 10%. What was the purchase price of pen? Correct Answer 32 Let, Purchase price = Tk.x At 15% loss SP = Tk.(17x/20) At 10% profit SP = Tk.(11x/10) As per question , (17x/20) + 8 = (11x/10) Or, 5x = 160 Or, x = 32 Therefore, the required value = Tk.32

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In the first 10 overs of a cricket game, the run rate was only 3.2. What should be the run rate in the remaining 40 overs to reach the target of 282 runs? Correct Answer 6.25 Hints: 282 - 10 × 3.2 / 40 = 6.25

Explanation:

Excluding stoppages, the speed of a bus is 54 kmph and including stoppages, it is 45 kmph. For how many minutes does the bus stop per hour? Correct Answer 10 Hints : In case of 1 hour, Without stoppages, the bus goes 54 km with stoppages the bus goes 45 km Distance ( 54 - 45) = 9 km Nows, it goes 54 km in 60 mins it goes 1 km in 60/ 54 km if goes 9 km in 60 × 9/ 54 = 10 mins

Explanation:

Train can travel 50% faster than a car. Both start from point A at the same time and reach point B 75 kms away from A at the same time. On the way, however, the train lost about 12.5 minutes while stopping at the stations. The speed of the car is : Correct Answer 120 kmph Hints : Let, car speed = x Train speed = 1.5x Time taken for car to go 75 km = t and train to go = (t - 12.5) t × x = ( t - 12.5) 1.5x t = 37.5 mun 37.5x = 75 x = 2km/min x = 120 km/h

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Running at the same constant rate, 6 identical machines can produce a totoal of 270 bottles per minute. At this rat, how many bottles could 10 such machines produce in 4 minutes? Correct Answer 1800 Hints : 270 × 10 × 4/ 6 = 1800 এই ধরনের গণিত গুলা কম সময়ে এভাবে করবেন।

Explanation:

In order to obtain an income of Tk. 650 from 10% stock at Tk. 96, one must make an investment of : Correct Answer Tk. 6500 Hints: 10% profit in TK.96 = 96 × 10% = 9.6 TK If profit 9.6TK. then investment 96 TK If profit 1 tk then investment 96/9.6 tk if profit 650 tk then investment 96 × 650/9.6 = 6500 tk

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A and B invest in a business in the ratio 3 : 2. If 5% of the total profit goes to charity and A's share is Tk. 855, the total profit is : Correct Answer Tk. 1500 Hints : Profit of A = 3 × Total profit × .95/3 + 2 855 = 3 × Total profit × .95 /5 Total profit = 1500

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There is 60% increase in an amount in 6 years at simple interest. What will be the compound interest of Tk. 12,000 after 3 years at the same rate? Correct Answer Tk. 3972 Hints : I = pnr r = I / Pn = . 60 /6 = . 10 C = p + (1 + r) n = 12000 ( 1 + . 10)3 = 15972 Ccompound interest = ( 15972 - 12000) = 3972

Explanation:

A man buys Tk. 20 shares paying 9% dividend. The man wants to have an interest of 12% on his money. The market value of each share is : Correct Answer Tk. 21 Hints, Without 9% dividend the share price is = 20 - 20 × 9% = 20 - 1.8 = 18.2 with 12% interest the market value is = 18.2 + 18.2 + 12% = 18.2 + 2.184 = 20.384 = 21

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A bank offers 5% compound interest calculated on half-yearly basis. A customer deposits Tk. 1600 each on 1st January and 1st July of a year. At the end of the year, the amount he would have gained by way of interest is : Correct Answer Tk. 120 Hints: C1 = 1600(1 + 1.5)5 = 1639.51 C2 = (1639.51 + 1600) (1 + .05)5 = 3319.51 The Amount gained = 3319.51 - 2 × 1600 = 119.51 = TK 120