The square of 35 is ? + 25.

The question mark in the above statement can be replaced by which of the following numbers?

1200

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125

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100

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Solution

The correct option is A
1200

We know that:

For every number (a5) with unit digit 5, we have:

(a5)² = a(a+1) hundred + 5²

35² = (3 x 4)100 + 25 = 1200 + 25

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The square of 35 is ? + 25. The question mark in the above statement can be replaced by which of the following numbers?

The correct option is A 1200 We know that: For every number (a5) with unit digit 5, we have: (a5)2 = a(a+1) hundred + 52 352 = (3 x 4)100 + 25 = 1200 + 25

The square of 35 is ? + 25.

The question mark in the above statement can be replaced by which of the following numbers?

The correct option is A
1200

We know that:

For every number (a5) with unit digit 5, we have:

(a5)² = a(a+1) hundred + 5²

35² = (3 x 4)100 + 25 = 1200 + 25