Simplification and Approximation

Question 11

5 + 5 / 5 = ?

• 6
• 2
• 1
• 10

Question 12

25 / 5 × 5 = ?

• 1
• 25
• 5
• 125

Question 13

8 / 4 / 2 = ?

• 1
• 4
• 8
• 2

Question 14

[(723+1992)²−(723−1992)²]/(723×1992) = ?

• 4
• 723
• 1992
• 2715

Question 15

If p - q = 6 and p² + q² = 116, what is the value of pq?

• 20
• 60
• 40
• 10

Question 16

103 x 103 + 97 x 97 = ?

• 21348
• 20018
• 19648
• 21428

Question 17

9848 x 125 = ?

• 1232000
• 1242000
• 1231000
• 1233000

Question 18

512 x 512 + 488 x 488 = ?

• 512438
• 502568
• 500288
• 514318

Question 19

What could be the maximum value of Y in the following equation given that neither of X, Y, Z is zero? 5X8 + 3Y4 + 2Z1 = 1103

• 0
• 7
• 8
• 9

Question 20

What is the unit\'s digit in the product (267)¹⁵³ x (66666)⁷² ?

• 7
• 6
• 1
• 2