Make your Brain Sharp
1. Which interchange of signs will make the following equation correct?
1. Which interchange of signs will make the following equation correct?
25 − 5 + 32 ÷ 4 × 6 = 13.
a. − and ÷ b. × and ÷
c. – and + d. × and –
2. Which interchange of signs will make the following equation correct?
2 × 3 – 5 + 5 ÷ 5 = 10.
a. − and ÷ b. + and ÷
c. − and + d. × and –
3. If 2A = 3B =4C, then
A : B : C is ;
a. 2 : 3 : 4 b. 4 : 3 : 2
c. 6 : 4 : 3 d. 3 : 4 : 3
4. If A/3=B/4=C/5, then
A : B : C is ;
a. 4 : 3 : 5 b. 3 : 4 : 5
c. 5 : 4 : 3 d. 5 : 3 : 4
5. The ratio of 435 : 264 is same as :
a. 2 : 1 b. 64 : 1
c. 32 : 1 d. 16 : 1
6. If 1/5:1/x=1/x:1/125, then the value of x is :
a. 15 b. 20 c. 25 d. 35
7. A single discount equivalent to a discount series 10%, 20% and 10% is
a. 40 % b. 35.2 %
c. 30 % d. 25.8 %
8. The average of a non-zero number and its square is 5 times the number. The number is:
a. 9 b. 17 c. 29 d. 295
9. The average age of the boys in a class is 16 and that of the girls is 15 years. The average age for the whole class is :
a. 15 years b. 15.5 years
c. 16 years
d. Cannot be determined.
10. A man travelled from the village to the post-office at the rate of 25km/h and walked back at the rate of 4 km/h. If the whole journey took 5 hours 48 minutes. Find the distance of the post-office from the
village.
a. 10 km b. 15 km
c. 20 km d. 25 km
11. In what time will a train 100 m long, cross an electric pole, if its speed be 144 km/h?
a. 2.5 seconds
b. 3 seconds
c. 3.5 seconds
d. 4 seconds
12. A 5 digit number is to be formed using digits 1, 2, 3, 4, 5 and 6 without repeated any digits. How many such numbers can be formed which are divisible by 4?
a.248 b.216 c.256 d.236