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Astrophysics (IOAA) 2021, organized by Colombia, and held in online mode from 14 to 21 November 2021. India was placed in the top position, jointly with Thailand and Russia in the country-wise medals tally. Four of the five Indian students participating in the competition won the gold medal and the fifth the silver.
The ratio of two numbers P and Q is 6: 11 respectively. When 5 is added to P and 84 is subtracted from Q, then the ratio of P and Q becomes 5: 2 respect...
If 'a' is the mean proportion of 12.8 and 0.8 and 'b' is the third proportional to 1.2 and 4.8, then find (a + b) :(b - a) .
Marks scored by A and B in a test are in the ratio 13:4 respectively. If B had scored 6 more marks, then marks scored by A would be 30% more than that o...
What number has to be added to each term of 2:5 to make the ratio 7:8?
The ratio of the monthly incomes of Dinesh, Nikhil and Rohan is 64:73:81. If Dinesh’s annual income is 10,496, what is Rohan’s annual income...
Marks scored by A and B in a test are in the ratio 13:5 respectively. If B had scored 5 more marks, then marks scored by A would be 30% more than that o...
If 1/3 of A = 75% of B = 0.6 of C, then A : B : C is
Ratio of males to females in village ‘A’ and village ‘B’ is 2:5 and 9:10, respectively and number of females in village ‘B’ is 25% more than...
Marks scored by A and B in a test are in the ratio 12:7 respectively. If B had scored 6 more marks, then marks scored by A would be 20% more than that o...
P, Q and R together started a business. Six times the investment of P equals eight times the investment of Q and the capital of Q is twice that of R. Fi...
