Algebra Riddles

#61 - Algebra Problem

Every words stands for unique digit that makes the arithmetic equation true
SEVEN + SEVEN + SIX = TWENTY.
What are the digits ?

#62 - Algebra Equation Puzzle

Replace the characters by the numerals, so that the mathematical operations are correct.
*Note:same character is can be replace by same numeral.

SINUS
SINUS
KOSINUS
-------
TANGENS

#63 - Arithmetic Operator Riddle

Can you make numbers as 24 , using numbers 3,3,7 & 7 with any arithmetic operator ?

#64 - Easy Algebra Problem

If,
9 * 8 * 7 = 65
8 * 7 * 6 = 50
7 * 6 * 5 = 37

Find
6 * 5 * 4 = ?

#65 - Solve Algebraic Equation

ONE
ONE
ONE
THREE
THREE
ELEVEN
---------
TWENTY

If O, T and E are not zero, and all the letters have a distinct value, can you solve for the letters?