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Question Detail

Simplify (212 * 212 + 312 * 312 )

  • 132288
  • 142088
  • 142188
  • 142288

Answer: Option D

Explanation:

Trick: Above equation can be solved by using following formula
(a2+b2)=12((a+b)2+(a−b)2)

Similar Questions :

1. What least number must be subtracted from 427398 so that remaining number is divisible by 15

  • 3
  • 5
  • 7
  • 9

Answer: Option A

Explanation:

On dividing 427398 by 15 we get the remainder 3, so 3 should be subtracted

2. A number when divided by the sum of 555 and 445 gives two times their difference as quotient and 30 as remainder. The number is

  • 22030
  • 220030
  • 23030
  • 24030

Answer: Option B

Explanation:

(555 + 445) * 2 * 110 + 30 = 220000 + 30 = 220030

3. 462−(?)2=4398−3066

  • 23
  • 18
  • 38
  • 28

Answer: Option D

4. What least value should be replaced by * in 223*431 so the number become divisible by 9

  • 3
  • 4
  • 5
  • 6

Answer: Option A

Explanation:

Trick: Number is divisible by 9, if sum of all digits is divisible by 9, so (2+2+3+*+4+3+1) = 15+* should be divisible by 9,
15+3 will be divisible by 9,
so that least number is 3.

5. Which is smallest prime number

  • 0
  • 2
  • 3
  • 7

Answer: Option B

Read more from - Numbers Questions Answers
Post a comment

  • basha 8 years ago

    excellent

    mastguru 8 years ago replied

    thanks Basha

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