Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 166 · 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) your handwriting (b) the colour of ink (c) what facts are given (d) the page number
2. 2.🧩 Diya is 10 years old. Saanvi is 8 years older than Diya. How old is Saanvi? (a) not enough info (b) 8 (c) 18 (d) 19
3. 3.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
4. 4.🧩 Aarav bought 2 mangoes for ₹110 in all. Each mango cost the same. What did one mango cost? (a) ₹55 (b) not enough info (c) ₹110 (d) ₹60
5. 5.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
6. 6.🧩 A box has 5 rows of eggs, with 8 in each row. How many eggs are in the box? (a) not enough info (b) 13 (c) 48 (d) 40
7. 7.📝 What does “evidence” mean? (a) a rumour (b) a guess (c) a loud opinion (d) facts that support it
8. 8.🧩 Meera is 6 years old. Ananya is older than Meera. How old is Ananya? (a) 11 (b) not enough info (c) 8 (d) 7
9. 9.🧩 Aarav bought 4 notebooks and a bag for ₹140 in all. Each notebook cost the same. What did one notebook cost? (a) ₹136 (b) ₹140 (c) ₹35 (d) not enough info
10. 10.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
11. 11.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
12. 12.🧩 The film starts at 6 PM and lasts 3 hours. When does it end? (a) 9 PM (b) 10 PM (c) not enough info (d) 6 PM
13. 13.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 6 PM (b) 7 PM (c) not enough info (d) 5 PM
14. 14.🧩 A box has 5 rows of apples, with 4 in each row. How many apples are in the box? (a) not enough info (b) 24 (c) 20 (d) 9
15. 15.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) not enough info (b) 5 PM (c) 6 PM (d) 4 PM
16. 16.📊 Which gives the best evidence about the class’s favourite game? (a) asking the whole class (b) guessing (c) asking one friend (d) asking your pet
17. 17.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) False (b) True
18. 18.🧩 Vihaan is 8 years old. Diya is older than Vihaan. How old is Diya? (a) 9 (b) 10 (c) 13 (d) not enough info
19. 19.🧩 The film starts at 3 PM and lasts 2 hours. When does it end? (a) 3 PM (b) 6 PM (c) not enough info (d) 5 PM
20. 20.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no mango is sweet (b) yes, it is certain (c) no, check more (d) yes, mangoes match
21. 21.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to change answers (c) to be sure of results (d) for fun only
22. 22.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) True (b) False
23. 23.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) not enough evidence (b) enough evidence
24. 24.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
25. 25.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
26. 26.🧩 Ishaan is 8 years old. Diya is older than Ishaan. How old is Diya? (a) not enough info (b) 10 (c) 13 (d) 9
27. 27.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
28. 28.🧩 A box has 8 rows of guavas, with 6 in each row. How many guavas are in the box? (a) 48 (b) 14 (c) not enough info (d) 54
29. 29.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
30. 30.🧩 A box has 7 rows of apples, with 8 in each row. How many apples are in the box? (a) 15 (b) 64 (c) not enough info (d) 56
31. 31.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 3 PM (b) 4 PM (c) 5 PM (d) not enough info
32. 32.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
33. 33.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) 5 PM (b) 2 PM (c) not enough info (d) 4 PM
34. 34.🧩 Ishaan bought 6 kites for ₹300 in all. Each kite cost the same. What did one kite cost? (a) ₹55 (b) not enough info (c) ₹50 (d) ₹300
35. 35.🧩 Ishaan is 8 years old. Nisha is 7 years older than Ishaan. How old is Nisha? (a) not enough info (b) 7 (c) 16 (d) 15
36. 36.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) 6 PM (b) not enough info (c) 5 PM (d) 7 PM
37. 37.🧩 The film starts at 3 PM and lasts 3 hours. When does it end? (a) 3 PM (b) 6 PM (c) 7 PM (d) not enough info
38. 38.🧩 Meera is 10 years old. Saanvi is 2 years older than Meera. How old is Saanvi? (a) 12 (b) not enough info (c) 13 (d) 2
39. 39.🧩 Aarav is 6 years old. Diya is older than Aarav. How old is Diya? (a) 7 (b) 11 (c) not enough info (d) 8
40. 40.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence

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