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# Maths (Number System) Quiz for Paper I

1. How many four digit numbers are there between 999 and 3000?
(a) 2001
(b) 2000
(c) 1999
(d) 1998
( Required number = 2999 – 1000 = 1999)

2. Arrangement of the fractions in ascending order is:
(a) 3/8,5/6,2/3,5/9
(b) 5/6,2/3,5/9,3/8
(c) 3/8,5/9,2/3,5/6
(d) 3/8,2/3,5/9,5/6
(Converting fractions into decimals.
3/8=0.375;5/9=0.555;2/3=0.666;
5/6=0.833
3/8,5/9,2/3,5/6 are in ascending order)

3. Evaluate: √64-∛64:
(a) 4
(b) 8
(c) 16
(d) 32
(8-4=4 )

4. The prime factors of the number 720 are:
(a) 2 × 2 × 3 × 3 × 2 × 5
(b) 2 × 3 × 4 × 5 × 6
(c) 3 × 3 × 4 × 4 × 5
(d) 2 × 2 × 2 × 2 × 3 × 3 × 5
(Prime factors of 720 = 2 × 2 × 2 × 2 × 3 × 3 × 5)

5. What is the highest common factor (HCF) of the numbers 425 and 476?
(a) 4
(b) 5
(c) 17
(d) 51
(H.C.F. of 425 and 476
17 is the HCF of given numbers)

6. The population of a city decreased from 25000 to 24500. The percentage of decrease is:
(a) 5%
(b) 2%
(c) 4%
(d) 3%
(% decrease =(24500 – 25000)/25000×100=2%)

7. The ratio of males to females in the population of a town is 12 : 13. Find the percent of females in the population:
(a) 48%
(b) 52%
(c) 50%
(d) 54%
(% of females =(Female ratio)/(Total Ratio)×100
=13/25×100=52% )

8. The simplest form of √0.0625/5 is :
(a) 0.5
(b) 0.05
(c) 0.005
(d) 5.00
(0.25/5
=0.05  )

9. The place value of 1 in 0.0159 is :
(a) 1
(b) 1/10
(c) 1/100
(d) 1/1000
(The place of value of 1 is 1/100)

10. The average 16, 13, 15, 11, 8 and 7 is 12, the value of x is :
(a) 9
(b) 10
(c) 12
(d) 14
(Average = (Sum of Numbers)/(Total Numbers)
12=(16 + 13 +15 + 11 + x + 8 + 7)/7
84 = 16 + 13 + 15 + 11 + x + 8 + 7
x = 84 – (16 + 13 + 15 + 11 + 8 + 7)
= 84 – 70 = 14 )