CDS Practice Questions — All Questions

The value of 7 x 6 - 12 is:

• a.24
• b.30✓
• c.36
• d.42

7 x 6 = 42; 42 - 12 = 30.

If 3x = 27, then x is:

• a.9✓
• b.6
• c.12
• d.81

x = 27 / 3 = 9.

The perimeter of a square with side 5 cm is:

• a.10 cm
• b.15 cm
• c.20 cm✓
• d.25 cm

Perimeter = 4 x side = 4 x 5 = 20 cm.

The average of 12, 15, and 18 is:

• a.12
• b.14
• c.16
• d.15✓

Sum 45 / 3 = 15.

25% of 80 is:

• a.15
• b.20✓
• c.25
• d.30

0.25 x 80 = 20.

The square root of 144 is:

• a.12✓
• b.14
• c.16
• d.24

12 x 12 = 144.