CROSSWORD STD 5 AND 6

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Across
  1. 1. 49-(-2)=...
  2. 4. FIND X, X/4=12
  3. 6. HALF TIMES 50 IS ...
  4. 7. FIND X, X+11=42
  5. 13. 10,00,000 IN INTERNATION SYSTEM OF NUMERATION IS...
  6. 14. NUMERAL FOR XL IS ...
  7. 16. 22.5/0.5 = ...
  8. 17. 2+8/4+3*2=...
  9. 18. 2-[3-{6-(5-4-1)}]=......
  10. 19. 24-6*2+4-6/3=....
Down
  1. 2. NUMERAL FOR X*VI IS....
  2. 3. (7*4)+(N*3)=7(4+3), N IS .....
  3. 5. PREDECESSOR OF 28 IS ...
  4. 8. TWO FIFTH TIMES 55 IS ...
  5. 9. ADDITIVE IDENTITY OF WHOLE NUMBER IS ...
  6. 10. LARGEST CHORD OF A CIRCLE IS CALLED AS ...
  7. 11. 9/0.5=...
  8. 12. THE PLACE VALUE OF 6 IN 76532 IS ...
  9. 15. THE COMMON DISTANCE OF THE CENTRE OF THE CIRCLE TO ITS POINTS IS...
  10. 20. 6/2*2+4=....