Mathematics Mcqs for PPSC, FFPS, NTS

The edges of three iron cubes are 6cm; 8cm; 10cm respectively. A new cube was made by melting them. Find the edge of the new cube?

A. 8 cm
B. 12 cm
C. 14 cm
D. 10 cm

The area of the floor of a room is 20 m2 that of a longer wall 15 m2 and of the shorter wall 12 m2, find the edge of the new cube?

A. 450 m3
B. 100 m2
C. 60 m3
D. 400 m3

If the sides of two cubes are in the ratio 3: 1 the ratio of their total surface area is?

A. 3:1
B. 8:1
C. 9:1
D. 12:1

The edges of a cuboid are respectively 3cm, 4cm and 12 cm. Find the length of the diagonal of cuboid.

A. 5 cm
B. 19 cm
C. 13 cm
D. 144 cm

The edges of a cuboid are 4 cm, 5 cm and 6 cm. Find the volume of the cuboid?

A. 120 cm3
B. 120 cm2
C. 148 cm2
D. 15 cm3

The edges of cuboid are 4 cm; 5 cm and 6 cm. Find its surface area?

A. 120 cm2
B. 148 cm2
C. 74 cm2
D. 15 cm2

The edge of three cubes of metal is 3 dm, 4 dm and 5 dm. They are melted and formed into a single cube. Find the edge of the new cube?

A. 3 dm
B. 4 dm
C. 5 dm
D. 6 dm

Machine P can print one lakh books in 8 hours. Machine Q can print the same number of books in 10 hours while machine R can print the same in 12 hours. All the machines started printing at 9 A.M. Machine P is stopped at 11 A.M. and the remaining two machines complete work. Approximately at what time will the printing of one lakh books be completed?

A. 3 pm
B. 2 pm
C. 1:00 pm
D. 11 am

P is able to do a piece of work in 15 days and Q can do the same work in 20 days. If they can work together for 4 days, what is the fraction of work left?

A. 8/15
B. 7/15
C. 11/15
D. 2/11

Two pipes P and Q can fill a cistern in 12 min. and 15 min. respectively but a third pipe ‘R’ can empty the full tank in 6 min.  P and Q are kept open for 5 min. in the beginning and then ‘R’ is also opened.  In what time is the cistern emptied ?

A. 30 min
B. 35 min
C. 40 min
D. 45 min