Question
Ratio of number of boys to girls in a school is 3:4
respectively. Next year, 30 boys and 40 girls left the school and 150 boys and 160 girls joined the school. If ratio of number of boys to girls now becomes 4:5, then find the number of boys now.Solution
Let the initial number of boys and girls be '3n' and '4n' respectively. (3n - 30 + 150) :(4n - 40 + 160) = 4:5 Or, 5 x (3n + 120) = 4 x (4n + 120) Or, 15n + 600 = 16n + 480 Or, 'n' = 120 Required number of boys = 3 x 120 - 30 + 150 = 480
If 33 @ 16 = 15' and 41 @ 32 = 7', then 64 @ 33 = ?'. What will come in place of question mark?
Select the letter cluster from among the given options that can replace the question mark (?) in the following series.
WGM, ZLT, CQA, ?, IAO, LFV
Select the option that is related to the third number in the same way as the second number is related to the first number:
12: 73 :: 16: ?
Select the option that is related to the third number in the same way as the second number is related to first number and the sixth number is related t...
Bird : Fly :: Lion ::Â ?
A statement is given, followed by two arguments numbered (I) and (II). Decide which of the given arguments strongly supports the statement.
 ...
Find the odd set of numbers from the given alternatives?
From the given alternatives, select the one in which the set of numbers is most like the set of numbers given in the question:
(4, 6, 30)
If 45 # 56 = 50 and 89 # 78 = 128, then 69 # 59 = ?
Select the related word/letters/number from the given alternatives.
Boat : Stream : : ?  : Track
