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Mathematics Quiz For RRB NTPC

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2.Two numbers are in the ratio 2 : 3. If 2 is subtracted from the first and 2 is added to the second, the ratio becomes 1 : 2. The sum of the numbers is :
(1) 30
(2) 28
(3) 24
(4) 10

 

3.If the sum and difference of two numbers are 20 and 8 respectively, then the difference of their squares is:
(1) 12
(2) 28
(3) 80
(4) 160

 

4.If Rs.126.5 is divided among A ,B,and C in the Ratio of 2:5:4 ,the share of B exceeds that of A by
(a) Rs.36.50
(b) Rs.35.50
(c) Rs.34.50
(d) Rs.33.50

 

5. The third proportional of 12 and 18 is
(1) 3
(2) 6
(3) 27
(4) 144

 

6.The unit digit in 3*38*537*1256 is
(1) 4
(2) 2
(3) 6
(4) 8

 

7.The average production of table fans on Monday & Tuesdays exceeds the average production of table fans during the week by:
(a) 150 fans
(b) 100 fans
(c) 140 fans
a(d) 200 fans

 

Directions : The bar graph shows the production of table fans in a factory during one week. Study the bar graph and answer the question.

8. Ratio of the total production of table fans in the factory from Monday to Wednesday to that from Thursday to Saturday is:
(a) 19 : 26
(b) 26 : 19
(c) 29 : 16
(d) 16 : 29

 

9. The average production of table fan in that week is:
(a) 370
(b) 280
(c) 300
(d) 250

 

10. The maximum production exceeds the minimum production by:
(a) 400
(b) 420
(c) 500
(d) 540

 

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