By what least number should 1200 be multiplied so that it becomes a perfect square?
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The 7th and 12th term of an arithmetic progression are -15 and 5 respectively. What is the 16th term?
The co-ordinates of the centroid of a triangle ABC are (-1,-2) what are the co-ordinates of vertex C, if co-ordinates of A and B are (6,-4) and (-2,2) respectively?
ΔABC is right angled at B. BD is an altitude. DC = 9 cm and AC = 25 cm. What is the value of BC (in cm)?
What is the sum of all prime numbers between 60 and 80?
Find the average of all prime numbers between 20 and 50.
If the 1st and the 3rd term of an arithmetic progression are -10 and -4, what is the 12th term?
Which of the following numbers is completely divisible by 99?