Question
Select the option that is related to the third number in
the same way the second number is related to the first number. 23: 7 :: 29: ?Solution
The second number is the sum of all the digits of the square of the first number. For [23, 7]: 23² = 529 → 5 + 2 + 9 = 16 → 1 + 6 = 7. For [29, ?]: 29² = 841 → 8 + 4 + 1 = 13 → 1 + 3 = 4
If a + b + c = 8, a² + b² + c² = 18 and ab + b c+ ca = 12, then what is the value of a³ + b³ +c³ –3abc?
If tan x + cot x  = 7, find  tan3 x + cot3 x = ?
- The ratio of M to N is 4:9, and that of N to O is 3:2. If the difference between O and M is 60, what is the total of M, N, and O?
If (p/q) = (7/8) and (q/r) = (3/11), then the find the value of {(r – p)/(p + q)}.
What will come in the place of question mark (?) in the given expression?
?2 = (392 × 224) ÷ (112 × 28) + 62
A man covered 40 km by bus and rest 25 km on foot. If the speed of the bus is 150% more than that of the man and the whole distance is covered in 2 hour...
If (a2  + 1/a2 ) = 66, then find the value of (a3  – 1/a3 ).
1/3 + 1/15 + 1/35 + 1/63 + 1/99 = ?
If 15a2Â + 1 = 20a, then find the value of {(9a2 + 1)/25a2}
- If x + 4y = 26 and 4x + y = 41, then find the value of (x - y).
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