1:- What comes next in the series 2, 6, 10, 22, 42…….?
d)None of these
Two times two plus two equals six, or two times two plus two.
The third number, 6 x 2 -2, equals ten, which is two less than the second.
The sixth number is therefore one more than twice as large as the fifth. The answer is therefore: 42 x 2 + 2 = 86.
2:-A defeats B by 60 metres or 6 seconds in a kilometre race. What is the total amount of time that A took?
b)1 minute and 36 seconds
d)None of these
A runs 1km = 1000 m, it means B runs 1000 – 60 = 940 meters
Time is taken by B for 60 meters = 6 seconds
Time is taken by B for 940 meters = 6/60× 960=96seconds
The time in which B covered 940 meters, A has covered 1000 meters.
∴ A’s time over the course =96 seconds
= 1minutes 36 seconds
3:-How many days will it take six men to harvest a field’s crops if fifteen men can do so in 30 days?
Let 6 men can reap a field in x days
So, put the same quantities on the same side.
Now, Men and Days are inversely proportional to each other. If we increase the number of men fewer days will be required to complete the work.
Inversely proportional means =15=1/30, 6=1/x
i.e., 6: 15 =30: x
Or, x = (30*15)/ 6
Or, x =75 days
Hence, 6 men can reap a field in 75 days.
4:-If 20 is 40% of a number, what is the number?
5:-In how many ways the letters of the word “COFFEE” can be arranged to form a different word?
6:- Today is sunday, after 68 days, it will be
Each day of a week is repeated after 7 days, so after 70 days, it will be Sunday.
Therefore, after 68 days, it will be Friday.
7:- A train moving at speed of 72 km/hr crosses a pole in 8 seconds. Find the length of the train.
Answer: – a)
Length of the train is equal to the distance covered by train to cross the pole. So, we will find the distance travelled by the train in 8 seconds by applying the following formula:
Distance= Speed x Time
Speed is given in Km/hr so we will convert it into m/s as answers are given in meters.
Speed=72* 5/18= 20 m/s
Time = 8 seconds
Distance = 20*8= 160 meters
8:- What is the probability of getting a odd number when a dice is rolled?
Explanation:- The sample space when a dice is rolled, S = (1, 2, 3, 4, 5 and 6)
So, n (S) = 6
E is the event of getting a odd number.
So, n (E) = 3
Probability = 3/6 =1/2
9:-A man purchases a TV for Rs. 6000 and sells it at 10% profit. What is the selling price of T.V?