Monday, February 14, 2011

3rd grade: Math problems for February 15 2011


Problem #1

Suppose five days before the day after tomorrow was Wednesday.
What day of the week was yesterday?

Problem #2

X and Y are two different numbers selected from the first fifty counting numbers from 1 to 50 inclusive.

What is the largest value that

(X+Y)/(X-Y) can have?

Problem #3

If 20 is added to one-third of a number, the result is the double of the number.
What is the number?

Problem #4

The counting numbers are arranged in four columns as shown below. Under which column letter will 101 appear?
A...B...C...D
1....2...3...4
8....7...6...5
9..10.11.12
..........14.13

Problem #5
In the 'magic square' below, the four numbers in each column, in each row, and in each of the two diagonals, have the same sum. What value should N have?
? ? 7 12
N 4 9 ?
? 5 16 3
8 11 ? ?
Problem #6
In the addition problem below, each letter stands for a digit and different letters stand for different digits.
What digits do the letters H, E, and A each represents.

HE
HE
HE
HE
+
HE
___
AH

The same written in different way: HE + HE +HE+HE=AH

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