Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 103 · 40 questions

Thinking tip (Enough facts, then decide): Not enough evidence: “One mango was sour, so all are sour.” Enough: “We checked all 40 mangoes; every one was ripe.” Before you answer, check every fact you need is given. 7 rows with 9 in each → 7 × 9 = 63. “A box has 9 in each row” with no number of rows → not enough info. Missing facts hide in words like “and a bag”, “older” (by how much?) and “a long film” (how long?).

1. 1.🧩 Before solving a word problem, first check… (a) the page number (b) your handwriting (c) the colour of ink (d) what facts are given
2. 2.🧩 A box has 7 rows of mangoes, with 7 in each row. How many mangoes are in the box? (a) 49 (b) 56 (c) not enough info (d) 14
3. 3.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) enough evidence (b) not enough evidence
4. 4.🧩 Rohan is 9 years old. Tara is older than Rohan. How old is Tara? (a) 14 (b) 11 (c) not enough info (d) 10
5. 5.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
6. 6.🧩 Meera is 11 years old. Rohan is older than Meera. How old is Rohan? (a) 13 (b) 12 (c) not enough info (d) 16
7. 7.🧩 Aarav is 10 years old. Arjun is older than Aarav. How old is Arjun? (a) 11 (b) 15 (c) not enough info (d) 12
8. 8.🧩 Ishaan is 12 years old. Saanvi is 2 years older than Ishaan. How old is Saanvi? (a) 14 (b) 15 (c) 2 (d) not enough info
9. 9.📝 What does “evidence” mean? (a) a loud opinion (b) a guess (c) a rumour (d) facts that support it
10. 10.🧩 Ishaan is 12 years old. Nisha is 8 years older than Ishaan. How old is Nisha? (a) 8 (b) 21 (c) not enough info (d) 20
11. 11.🧩 Rohan is 12 years old. Diya is 6 years older than Rohan. How old is Diya? (a) 18 (b) 6 (c) not enough info (d) 19
12. 12.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
13. 13.🧩 Rohan is 8 years old. Tara is older than Rohan. How old is Tara? (a) 13 (b) 10 (c) 9 (d) not enough info
14. 14.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) not enough info (b) 5 PM (c) 2 PM (d) 6 PM
15. 15.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
16. 16.🧩 A box of mangoes has 5 in each row. How many mangoes are in the box? (a) 50 (b) 5 (c) 10 (d) not enough info
17. 17.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) asking the whole class (c) asking one friend (d) guessing
18. 18.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
19. 19.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
20. 20.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) not enough evidence (b) enough evidence
21. 21.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) not enough info (b) 4 PM (c) 6 PM (d) 5 PM
22. 22.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) not enough info (b) 5 PM (c) 7 PM (d) 8 PM
23. 23.🧩 A box of oranges has 4 in each row. How many oranges are in the box? (a) not enough info (b) 40 (c) 8 (d) 4
24. 24.🧩 A box has 8 rows of oranges, with 6 in each row. How many oranges are in the box? (a) 14 (b) 48 (c) 54 (d) not enough info
25. 25.🧩 Kabir is 10 years old. Ananya is 7 years older than Kabir. How old is Ananya? (a) 18 (b) 7 (c) not enough info (d) 17
26. 26.🧩 Vihaan bought 5 pens for ₹125 in all. Each pen cost the same. What did one pen cost? (a) ₹30 (b) not enough info (c) ₹125 (d) ₹25
27. 27.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) True (b) False
28. 28.🧩 A box of laddoos has 9 in each row. How many laddoos are in the box? (a) 18 (b) 90 (c) 9 (d) not enough info
29. 29.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) 6 PM (b) not enough info (c) 8 PM (d) 7 PM
30. 30.🧩 Ishaan bought 3 notebooks for ₹180 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹60 (c) ₹65 (d) ₹180
31. 31.🧩 Tara is 11 years old. Nisha is 6 years older than Tara. How old is Nisha? (a) 6 (b) 18 (c) not enough info (d) 17
32. 32.🧩 Rohan is 7 years old. Meera is older than Rohan. How old is Meera? (a) 12 (b) not enough info (c) 8 (d) 9
33. 33.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
34. 34.🧩 Ishaan bought 3 notebooks for ₹75 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹25 (c) ₹75 (d) ₹30
35. 35.🧩 Ananya bought 2 mangoes for ₹110 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹55 (c) ₹110 (d) ₹60
36. 36.🧩 A box of guavas has 9 in each row. How many guavas are in the box? (a) 18 (b) not enough info (c) 9 (d) 90
37. 37.🧩 Diya bought 4 notebooks for ₹60 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹60 (c) ₹15 (d) ₹20
38. 38.🧩 Ananya bought 4 notebooks and a lunch box for ₹210 in all. Each notebook cost the same. What did one notebook cost? (a) ₹210 (b) not enough info (c) ₹206 (d) ₹52
39. 39.🧩 A box of guavas has 7 in each row. How many guavas are in the box? (a) 70 (b) 7 (c) 14 (d) not enough info
40. 40.🧩 A box has 4 rows of laddoos, with 9 in each row. How many laddoos are in the box? (a) 13 (b) 45 (c) 36 (d) not enough info

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