NAT I Computer Science Quantitative

Four people are asked to stand in a straight line. In how many different orders can they line up ?

• 12 A
• 16 B
• 24 C
• 6 D

(x+y)²=25 and x²+y²=13 then xy is equal to?

• 16 A
• 20 B
• 18 C
• 6 D

Find the value of x if 3:b=x:c.

• 3b/c A
• c/3b B
• 2c/3b C
• 3c/b D

Out of the 44 boys in a class 9 are of the age of 10, 15 at the age of 9, and the rest are at the age of 8. Find their average age.

• 7.85 A
• 8.75 B
• 12.2 C
• 14.35 D

If (x+1/x)²=96 what is the value of x² + 1/x² ?

• 94 A
• 98 B
• 100 C
• 90 D

(60)²=? x 72

• 36 A
• 3600 B
• 40 C
• 50 D

A clock gain 8 minutes every x hours. How many hours will the clock gain in 3 days ?

• 576/x A
• 48/5x B
• 24/x C
• 576/5x D

• 41^O A
• 65^O B
• 115^O C
• 106^O D

A team played 30 games of which it won 24. What part of the games played did it close ?

• 1/5 A
• 5/6 B
• 6/5 C
• 5 D

If (p-3) (p+4) > (p-3)(p+8) , what is the best description of p?

• p=3 A
• -8<p<-5 B
• p={ } C
• p<3 D

72 + 679 + 1439 + 537 + ?=4036

• 1309 A
• 1208 B
• 2308 C
• 2423 D

A clock gain 8 minutes every x hours. How many hours will the clock gain in 3 days?

• 576/x A
• 48/5x B
• 24/x C
• 576/5x D

(44 x 3) + 128 + 120 / 9.5 - 94.7

• 380 A
• 10 B
• 76.12 C
• 100 D

The average height of a class of 14 boys is 5.3 feet. A new boy admitted to the class, the new average of height now becomes 5.25. What is the height of the new boy ?

• 4.55 A
• 5.0 B
• 6.0 C
• 3.5 D

• 780 A
• 585 B
• 1170 C
• 540 D

If x=7y+3 and z=49y² then what is 'z' in terms of x?

• X2 A
• x²-3 B
• (x-3)²/7 C
• None D

2x2y when multiplied with x² + y² gives ?

• 2x²y³ + 2xy³ A
• 2x⁴y+ 2x²y³ B
• 2xy²+ 2x²y C
• 2xy³+ 2x³y D

• 5 A
• 10 B
• 110 C
• 125 D

1.02 - 0.02 + ? = 1.842

• 0.222 A
• 0.842 B
• 2 C
• None D

What is the sum of money, 6% of which is 18 dollars?

• 600 A
• 200 B
• 300 C
• 20 D