Scroll:Mental Sums >> Mental Sums >> saq (1210)

Written Instructions:

For each Multiple Choice Question (MCQ), four options are given. One of them is the correct answer. Make your choice (1,2,3 or 4). Write your answers in the brackets provided..

For each Short Answer Question(SAQ) and Long Answer Question(LAQ), write your answers in the blanks provided.

Leave your answers in the simplest form or correct to two decimal places.


 

1)  

3 x 10 000 + 7 x 1000 + 1 x 100 + 7 x 1 = _____        

What is the missing number in the blank


Answer:_______________




2)  

5 x 10 000 + 4 x 1000 + 3 x 100 + 7 x 1 = _____        

What is the missing number in the blank


Answer:_______________




3)  

8 x 10 000 + 2 x 1000 + 9 x 100 + 4 x 1 = _____        

What is the missing number in the blank


Answer:_______________




4)  

3 x 10 000 + 5 x 1000 + 6 x 100 + 7 x 1 = _____        

What is the missing number in the blank


Answer:_______________




5)  

8 x 10 000 + 4 x 1000 + 6 x 100 + 6 x 1 = _____        

What is the missing number in the blank


Answer:_______________




6)  

1 x 10 000 + 3 x 1000 + 1 x 100 + 7 x 1 = _____        

What is the missing number in the blank


Answer:_______________




7)  

7 x 10 000 + 8 x 1000 + 1 x 100 + 5 x 1 = _____        

What is the missing number in the blank


Answer:_______________




8)  

9 x 10 000 + 8 x 1000 + 6 x 100 + 4 x 1 = _____        

What is the missing number in the blank


Answer:_______________




9)  

7 x 10 000 + 8 x 1000 + 5 x 100 + 7 x 1 = _____        

What is the missing number in the blank


Answer:_______________




10)  

2 x 10 000 + 5 x 1000 + 4 x 100 + 8 x 1 = _____        

What is the missing number in the blank


Answer:_______________




 

1)  

3 x 10 000 + 7 x 1000 + 1 x 100 + 7 x 1 = _____        

What is the missing number in the blank
Answer: 37107


SOLUTION 1 :

Step 1: 3 x 10000 = 30000
Step 2: 7 x 1000 = 7000
Step 3: 1 x 100 = 100
Step 4: 7 x 1 = 7
Step 5: 30000 + 7000 + 100 + 7 = 37107

The missing number is 37107.



2)  

5 x 10 000 + 4 x 1000 + 3 x 100 + 7 x 1 = _____        

What is the missing number in the blank
Answer: 54307


SOLUTION 1 :

Step 1: 5 x 10000 = 50000
Step 2: 4 x 1000 = 4000
Step 3: 3 x 100 = 300
Step 4: 7 x 1 = 7
Step 5: 50000 + 4000 + 300 + 7 = 54307

The missing number is 54307.



3)  

8 x 10 000 + 2 x 1000 + 9 x 100 + 4 x 1 = _____        

What is the missing number in the blank
Answer: 82904


SOLUTION 1 :

Step 1: 8 x 10000 = 80000
Step 2: 2 x 1000 = 2000
Step 3: 9 x 100 = 900
Step 4: 4 x 1 = 4
Step 5: 80000 + 2000 + 900 + 4 = 82904

The missing number is 82904.



4)  

3 x 10 000 + 5 x 1000 + 6 x 100 + 7 x 1 = _____        

What is the missing number in the blank
Answer: 35607


SOLUTION 1 :

Step 1: 3 x 10000 = 30000
Step 2: 5 x 1000 = 5000
Step 3: 6 x 100 = 600
Step 4: 7 x 1 = 7
Step 5: 30000 + 5000 + 600 + 7 = 35607

The missing number is 35607.



5)  

8 x 10 000 + 4 x 1000 + 6 x 100 + 6 x 1 = _____        

What is the missing number in the blank
Answer: 84606


SOLUTION 1 :

Step 1: 8 x 10000 = 80000
Step 2: 4 x 1000 = 4000
Step 3: 6 x 100 = 600
Step 4: 6 x 1 = 6
Step 5: 80000 + 4000 + 600 + 6 = 84606

The missing number is 84606.



6)  

1 x 10 000 + 3 x 1000 + 1 x 100 + 7 x 1 = _____        

What is the missing number in the blank
Answer: 13107


SOLUTION 1 :

Step 1: 1 x 10000 = 10000
Step 2: 3 x 1000 = 3000
Step 3: 1 x 100 = 100
Step 4: 7 x 1 = 7
Step 5: 10000 + 3000 + 100 + 7 = 13107

The missing number is 13107.



7)  

7 x 10 000 + 8 x 1000 + 1 x 100 + 5 x 1 = _____        

What is the missing number in the blank
Answer: 78105


SOLUTION 1 :

Step 1: 7 x 10000 = 70000
Step 2: 8 x 1000 = 8000
Step 3: 1 x 100 = 100
Step 4: 5 x 1 = 5
Step 5: 70000 + 8000 + 100 + 5 = 78105

The missing number is 78105.



8)  

9 x 10 000 + 8 x 1000 + 6 x 100 + 4 x 1 = _____        

What is the missing number in the blank
Answer: 98604


SOLUTION 1 :

Step 1: 9 x 10000 = 90000
Step 2: 8 x 1000 = 8000
Step 3: 6 x 100 = 600
Step 4: 4 x 1 = 4
Step 5: 90000 + 8000 + 600 + 4 = 98604

The missing number is 98604.



9)  

7 x 10 000 + 8 x 1000 + 5 x 100 + 7 x 1 = _____        

What is the missing number in the blank
Answer: 78507


SOLUTION 1 :

Step 1: 7 x 10000 = 70000
Step 2: 8 x 1000 = 8000
Step 3: 5 x 100 = 500
Step 4: 7 x 1 = 7
Step 5: 70000 + 8000 + 500 + 7 = 78507

The missing number is 78507.



10)  

2 x 10 000 + 5 x 1000 + 4 x 100 + 8 x 1 = _____        

What is the missing number in the blank
Answer: 25408


SOLUTION 1 :

Step 1: 2 x 10000 = 20000
Step 2: 5 x 1000 = 5000
Step 3: 4 x 100 = 400
Step 4: 8 x 1 = 8
Step 5: 20000 + 5000 + 400 + 8 = 25408

The missing number is 25408.