23
Q:

The last two digits of 2151415?

A) 81 B) 61
C) 91 D) 51

Answer:   D) 51



Explanation:

Unit digit of this expression is always 1 as the base ends with 1. 

For the tenth place digit we need to multiply the digit in the tenth place of the base and unit digit of the power and take its unit digit.

i.e, tenth place digit in 2151 is 5 and

tenth place digit in power 415 is 1

And the units digit in the product of 5 x 1 = 5

 

Therefore, last two digits of 2151415 is 51.

Subject: Mathematical Operations
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Q:

If "–" stands for "÷", "+"stands for "x", "÷" for "–" and "x" for "+", which of the following equations is correct?

A) 40 – 10 + 5 ÷ 4 x 5 = 21 B) 40 + 10 – 4 x 5 ÷ 3 = 80
C) 40 ÷ 10 – 4 x 5 + 3 = 32 D) 8 – 4 x 40 ÷ 2 + 15 = 30
 
Answer & Explanation Answer: A) 40 – 10 + 5 ÷ 4 x 5 = 21

Explanation:
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Q:

If "#" means "subtraction", "&" means "division", "@" means "addition" and "%" means "multiplication" then

 

516 & 6 # 11 @ 50 % 4 = ?

 

A) 210 B) 274
C) 250 D) 275
 
Answer & Explanation Answer: D) 275

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13 3688
Q:

Select the missing number from the given responses.

A) 45 B) 65
C) 70 D) 80
 
Answer & Explanation Answer: B) 65

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32 2287
Q:

If '+' means subtraction, '÷' means addition, '<' means multiplication and '>' means division, then find the value of the given statement,

The value of 9 ÷ 7 < 8 > (4>2) + 5 will be

A) 32 B) 18
C) 16 D) 11
 
Answer & Explanation Answer: A) 32

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13 1627
Q:

Find the missing number from the alternatives.

A) 125 B) 175
C) 225 D) 250
 
Answer & Explanation Answer: C) 225

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14 1373
Q:

Find the missing number?

A) 32 B) 30
C) 28 D) 36
 
Answer & Explanation Answer: D) 36

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6 1159
Q:

Find the missing number?

A) 120 B) 23
C) 55 D) 30
 
Answer & Explanation Answer: B) 23

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4 1381
Q:

Select the missing number in the given question?

A) 9 B) 4
C) 8 D) 2
 
Answer & Explanation Answer: D) 2

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