Question
A plane electromagnetic wave travels in vacuum along
z-direction. What can you say about the directions of its electric and magnetic field vectors? If the frequency of the wave is 50 MHz, what is its wavelength?Solution
The LCM of two numbers is 840 and their HCF is 14. If one of the numbers is 84, find the other number.
HCF of two numbers 70 and 140 can be expressed in the form of (20m – 110) whereas LCM of these two numbers can be expressed in the form of (40n – 20...
A vendor has 3 kinds of shakes i.e. chocolate, strawberry and banana. He has 180 litres of chocolate shake, 360 litres of strawberry shake and 540 litre...
The smallest number which when divided by 27 and 36 leaves remainder 12 and 21 respectively is:
The LCM of two natural numbers is 8 times their HCF. If the product of given two numbers is 1152, then find the LCM of the numbers.
If the highest common factor of two numbers is 15, then which of the following may be the least common multiple of the numbers?
The greatest number, which when subtracted from 1063, gives a number exactly divisible by each of 15, 20, 30 and 35, is:
HCF of two numbers 75 and 105 can be expressed in the form of (15m – 120) whereas LCM of these two numbers can be expressed in the form of (50n – 25...
The HCF of two numbers is 112, and their LCM is 3360. What is the sum of the numbers?
Three numbers are in the ratio 5:3:2 respectively. If the HCF of the numbers is 4, then find the LCM of the numbers.
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