Maths MCQs

IF 45 percent of X is equal to 15 percent of Y, then what is the value of X:Y?

Question: IF 45 percent of X is equal to 15 percent of Y, then what is the value of X:Y? Answer: 4. 1:3 Solution: 0.45x=0.15y3x=yx:y=1:3

The product of two numbers is 720 and their Highest common factor is 4. What is the Least common multiplier of these numbers?

Question: The product of two numbers is 720 and their Highest common factor is 4. What is the Least common multiplier of these numbers? Answer: 3. 180 Solution: product of two numbers= HCF X LCM720= 4 LCMLCM= 180

Rs. 9000 is lent at the rate of 80 percent per annum on compound interest (compounded half yearly). what will be the compound interest of 12 months?

Question: Rs. 9000 is lent at the rate of 80 percent per annum on compound interest (compounded half yearly). what will be the compound interest of 12 months? Answer: Rs. 8640 Solution:interest= PXRXT/100Compound interest be x(9000(0.5)(0.8)+ 9000(1+0.5(0.8))(0.8)(0.5))/1003600+5040Rs 8640

Swapnil can build a sofa in 16 days. Working together with Revathi he can finish the work in 129/17 days. Find the number of days taken by Revathi to complete the work if she works alone.

Question: Swapnil can build a sofa in 16 days. Working together with Revathi he can finish the work in 129/17 days. Find the number of days taken by Revathi to complete the work if she works alone. Answer: 4. 128/9 days Solution:building a sofa workdone = wSwapnil can do in 16 days = w=16ss=speed of

25 percent of 20 percent of a number is equal to 250. What is the 35 percent of that number?

Question: 25 percent of 20 percent of a number is equal to 250. What is the 35 percent of that number? Answer: 1750 Solution: 25 percent of 20 percent of a number x = 2500.25(0.2)x=25035 percent of the number =0.35×0.35x= (250x4x5x35)/100=5x2x5x35=1750

Selling price of a table is Rs. 6875. If profit percentage is 25 percent, then what is the cost price of table?

Question: Selling price of a table is Rs. 6875. If profit percentage is 25 percent, then what is the cost price of table? Answer: 2. Rs. 5500 Solution: s= Rs. 6875 cost price be cc+0.25c=1.25c=s=6875c= Rs. 5500

If 72 binders can bind 720 books in 22 days, how many binders will be required to bind 660 books in 12 days?

Question: If 72 binders can bind 720 books in 22 days, how many binders will be required to bind 660 books in 12 days? Answer: 3. 121 Solution:workdone for 1 book= (binders x days) / n.o of books=( 22 x72)/720workdone for 660 books in 12 days for (1 book work)= (binders x 12) /660(binders x

The simple interest received on a sum for 40 years is 2/5 of the sum. what is the annual rate of interest?

Question: The simple interest received on a sum for 40 years is 2/5 of the sum. what is the annual rate of interest? Answer: 3. 1 percent Solution:formula S.I= PXRXT/(100)2/5X = X(R)(40)/(100)R= 1 percent

After working for 8 days. Rakhi finds that only 10 percent of the work is completed. She employs Poonam who is 20 percent more efficient than Rakhi. How many more days will they together take to complete the remaining work?

Quesion: After working for 8 days. Rakhi finds that only 10 percent of the work is completed. She employs Poonam who is 20 percent more efficient than Rakhi. How many more days will they together take to complete the remaining work? Answer: 4. 360/11 days Solution: Total work =wRakhi speed to complete work xpoonam speed

If M:N=9:6, then what is the value of (M+N):(M-N)?

Question: If M:N=9:6, then what is the value of (M+N):(M-N)? Answer: 3. 5:1 Solution: (M+N):(M-N)Dividing it by N on denominator as well as numeratorM/N=x=9:6=3:2(M+N):(M-N)=(x+1)/(x-1)=2.5/.5=55:1

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