Yash scored 10 marks more in second test than that in first. 5 times the score of the second test is same as square of the score in first test. Find his score in first test.

If three numbers are added, their sum is 2 . If 2 times the second number is subtracted from the sum of first and third number, we get 8 and if three times the first number is added to the sum of second and third number, we get 4 . Find the numbers using matrices.

A set of 11 tuning forks is kept in ascending order of frequencies. Each tuning fork gives 5 beats per second with the previous one. If the frequency of the last fork is 1.5 times that of the first , find the frequency of the first and last fork.

A set of 48 tuning forks is arranged in a series of descending frequencies such that each fork gives 4 beats per second with preceding one.The frequency of first fork is 1.5 times the frequency of the last fork, find the frequency of the first and 42^nd tuning fork.

The sum of three numbers is 15.If the second number is subtracted from the sum of first and third numbers then we get 5.When the third number is subtracted from the sum of twice the first number and the second number,we get4.Find the three numbers.

If three numbers are added the sum is 15. If the second number is subtracted from the sum of first and third number then we get 5 and if twice the first number is added to the second and the third number is subtracted from the sum we get 4 . Use matrices to find the numbers.

Apparatus: Two test tubes, bent tube, rubber cork, burner, etc. Chemicals: Calcium carbonate, freshly prepared lime water. Procedure: Take some calcium carbonate in a test tube. Fit a bent tube to this test tube with the help of a rubber cork. Insert the other end of the bent tube in the freshly prepared lime water taken in the other test tube. Heat the powdered calcium carbonate in the first test tube strongly. What will you observe?