Question
A student calculates the average of five two-digit numbers.
If one of them is reversed and the new average increases by 9, and all the numbers are consecutive multiples of 12, then what is the reversed number?Solution
ATQ,
Let the number which is reversed be (10a + b)
Then reversed = (10b + a)
As per question:
10b + a – 10a – b = 9 × 5
⇒ 9(b – a) = 45
⇒ b – a = 5
Now checking five consecutive multiples of 12:
24, 36, 48, 60, 72
Try 27 → reversed = 72
So the number which is reversed is 27
Choose the correct answer:
7845 – ? = 8461–3569
With which neighbouring country did India sign the Farakka Treaty in 1996 for sharing of the Ganga Waters and on augmenting its flows?
Who among the following was India's defence minister during the 1971 war between India and Pakistan?
_______ article of the Indian Constitution describes about the Protection of Interests of Minorities.
Consider the following statements in regards to the Economic Survey of India 2022-23:
1. 315.7 million tonnes of food grains produced in I...
What was the fate of Bahadur Shah Zafar, the last Mughal Emperor, after the revolt was suppressed?
Which Indian state secured the top position for its tableau titled "Woman Empowerment in Viksit Bharat" in the Republic Day parade?
How many teams participated in the Men ’ s 36th Federation Cup volleyball tournament held in Karaikal from April 20 to 26?
President Of Russia
In the case of a deadlock between the two houses of the Parliament of India, on a legislative measure the joint sitting is presided over by the ________...