Question
Each of six teachers M, N, P, Q, S and I have their
classes on six different days of a week starting from Monday and ending on Saturday of the same week, but not necessarily in the same order. Only two teachers have classes before N's class. 'S' has the class on Tuesday and 'O' has the class on Saturday. Only one teacher has the class after the class of 'M'. P's class is not between the classes of 'M' and 'N'. Who among the following has the class on Monday?Solution
P has a class on Monday.
(408 × 680)÷(20% of 680) = (250 × 260)÷ 10 + ? – 4500
If x + y + z = 7, x² + y² + z² = 85 and x³ + y³ + z³ = 842, then the value of √3 xyz is:
...If x = (2+√3)/(2-√3), y = (2-√3)/(2+√3)
Then find out the value of (x²+y²-xy)/(x²+y²+xy)
If x : y : z = 6 : 7 : 11, and (2x + 3z) = 180, then find the value of y.

If 1/(x+ 1/(y+ 1/z)) = 13/30, then find x+y+z= ?
If (a + b) = 9 and ab = 14, find the value of (a² + b²).

Find the number of zeroes in 18 × 125 × 20 × 32.
(p + q) = 8 and (p2 + q2Â - 6) = 28. If p < q, then determine the value of (p/q).