Mathematics Questions and Answers - Form 1 Mid Term 1 Exams 2022

Questions

1. Write the following numbers in words. 2mks
   
   1. 392409
   2. 694372008
2. Round off each of the following numbers to the nearest number indicated in brackets. 2 mks
   1. 473678 (100)
   2. 524239(1000)
3. Work out. 2mks
   98+6734-348
4. Express the following numbers in terms of their prime factors. 2mks
   1. 900
   2. 4725
5. Test whether the following numbers are divisible by 8.4mks
   1. 3027144
   2. 78104
6. The G.C.D of two numbers is 42 their LCM is 420. If one of the numbers is 210. Find the other number. 4mks.
7. Three bells a, b, c ring at intervals of 30, 40 and 45 minutes respectively. If the three rings together at 7.00 am. After how long will they ring together next. 4mks
8. By use of number line evaluate. 4mks
   1. [+2] + [+3]
   2. [+4]-[+3]
9. Mercy was given sh 600 as pocket money. She spent sh 380 on shopping. If she owed her classmates sh 350. How much debt was she left with having paid what she had? 3mks
10. Find the LCM of 24 and 36. 3mks

Marking Scheme

1. Write the following numbers in words. 2mks
   
   1. 392409
      • Three hundred and ninety two thousand, four hundred and nine.
        
        
   2. 694372008
      • Six hundred and ninety four million, three hundred and seventy two thousand and eight.
        
        
2. Round off each of the following numbers to the nearest number indicated in brackets. 2 mks
   
   1. 473678 (100)
      • 473700
        
        
   2. 524239(1000)
      • 524000
        
        
3. Work out. 2mks
   • 98+6734+348
     98
     +6734
     348
     7180
     
     
4. Express the following numbers in terms of their prime factors . 2mks
   • 900=2x2x3x3x5x5
     4725=3x3x3x5x5x7
     
     
5. Test whether the following numbers are divisible by 8.4mks
   1. 3027144
      • the last 3 digit are divisible by 8
        144/8=18
        
        
   2. 78104
      • the last digits are divisible by 8.
        104/8=23
        
        
6. The G.C.D of two numbers is 42 their LCM is 420. If one of the numbers is 210. Find the other number. 4mks
   • 42=2x3x7
     420=2x2x3x5x7
     210= 2x3x5x7
     The other number is 2x2x3x7=84
     
     
7. Three bells a,b,c ring at intervals of 30,40 and 45 minutes respectively. If the three rings together at 7.00am . After how long will they ring together next. 4mks
   L.C.M= 2X2X2X3X5X5= 10hrs
   

   2	30	40	45
   2	15	20	45
   2	15	10	45
   3	15	5	45
   3	5	5	15
   5	5	5	5
   	1	1	1

   2 x 2 x 2 x 3 x 3 x 5 = 360
   360/60= 6hrs
   7+ 6= 13:00
   1:00pm
   
   
8. By use of number line evaluate. 4mks
   1. [+2]+[+3]=+5
   2. [+4]-[+3]=+3
9. Mercy was given sh 600 as pocket money. She spent sh 380 on shopping. If she owed her classmates sh 350. How much debt was she left with having paid what she had? 3mks
   • After shopping sh 600-380=sh220
     Paid 350-220=sh130
     Remaining debt sh 130
10. Find the LCM of 24 and 36. 3mks
    • 24= 2x2x2x3
      36=2x2x3x3
      LCM= 72