(Study Material) RRB NTPC (Tier -2) Exam (Numerical Aptitude) - Orders of Magnitude

(Study Material) RRB NTPC (Tier -2) Exam (Numerical Aptitude) - Orders of Magnitude

1. Ramesh is to get his home painted within 2 days. He has four men to do this work.

(i) First man paints 10 sq m in one hour but work only 8 h in a day.
(ii) Second man paints 5 sq m in one hour but work only 12 h in a day.
(iii) Third man paints 20 sq m in one hour but work only 4 h in a day.
(iv) Fourth man paints 15 sq m in one hour but work only 6 h in a day.

If 175 sq m area is to be painted, then which men will complete the work alone in time ?

(a) First
(b) Second
(c) Third
(d) Fourth

2. In the women cricket team of 11 players, each of four players Mithali Raj, Anjum, Jhulan and Sharda are replaced by a new player of 28 yr, then the following respective changes occur.

(i) Average age of team decreases by 0.5 yr
(ii) Average age of team decreases by 1 yr
(iii) Average age of team increases by 0.5 yr
(iv) Average age of team decreases by 0.75 yr

Which of the following players has maximum age?

(a) Mithali Raj
(b) Anjum
(c) Jhulan
(d) Sharda

3. HCF of 105, 150 and 210 is x, HCF of 126, 396, 1080 is y and HCF of 440, 180 and 280 is z. Which of the following is greatest?

(a) x
(b) y
(c) z
(d) All are equal

4. A and B can do a piece of work in 72 days, B and C can do it in 120 days, A. and C can do it in 90 days. Who is more efficient?

(a) A
(b) B
(c) C
(d) Can’t be determined

5. There are two rooms of size 1m x 1m x 1m and 95 cm x 90 cm x 115 cm. Which one is more vacuumed?

(a) First room
(b) Second room
(c) Both are equal vacuumed
(d) Can’t be determined

Buy Printed Study Kit for Railway Recruitment Board (RRB) "Tier -2" Exam

रेलवे भर्ती बोर्ड (आरआरबी) परीक्षा (टीयर -2) के लिए अध्ययन सामग्री

Buy Postal Test Series Programme For RRB Tier -2 Exam (English Medium)

<<Go Back To Main Page