Class 10- Higher Order Thinking Questions For 100% Score in Mathematics (Part1)

1) The 8th term of an Ap is zero, Prove that its 38th term is triple of its 18th-term (2) In D BAC      BCA is a right angled and Q is the midpoint of BC Prove that.    1) BC²= 4 (AQ² - AC² )     2) AB²= 4AQ²  -   3Ac² 3) Show that the points A (5.6), B (1 5),C(2,1) and D (6,2) are the vertices of square 4) Seven times a two- digit number is equal to four times the number obtained by reversing the digits. If the difference between the digits is 3. Find The number