Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 620 · 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.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
2. 2.🥭 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) yes, mangoes match (d) no, check more
3. 3.🧩 Arjun bought 6 kites for ₹330 in all. Each kite cost the same. What did one kite cost? (a) ₹330 (b) ₹60 (c) not enough info (d) ₹55
4. 4.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
5. 5.🧩 Meera is 8 years old. Arjun is 4 years older than Meera. How old is Arjun? (a) not enough info (b) 12 (c) 13 (d) 4
6. 6.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) 3 PM (b) 4 PM (c) not enough info (d) 5 PM
7. 7.🧩 Before solving a word problem, first check… (a) your handwriting (b) the page number (c) the colour of ink (d) what facts are given
8. 8.🧩 Saanvi bought 5 balls and a bag for ₹240 in all. Each ball cost the same. What did one ball cost? (a) ₹235 (b) ₹48 (c) not enough info (d) ₹240
9. 9.🧩 Ishaan is 6 years old. Rohan is 2 years older than Ishaan. How old is Rohan? (a) 9 (b) 2 (c) not enough info (d) 8
10. 10.🧩 Vihaan is 8 years old. Arjun is 7 years older than Vihaan. How old is Arjun? (a) 16 (b) not enough info (c) 7 (d) 15
11. 11.🔬 Why do scientists repeat an experiment? (a) to change answers (b) for fun only (c) to waste time (d) to be sure of results
12. 12.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
13. 13.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) True (b) False
14. 14.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
15. 15.🧩 Nisha is 7 years old. Meera is 8 years older than Nisha. How old is Meera? (a) 16 (b) not enough info (c) 8 (d) 15
16. 16.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
17. 17.🧩 Ananya is 12 years old. Ishaan is older than Ananya. How old is Ishaan? (a) 14 (b) not enough info (c) 13 (d) 17
18. 18.🧩 Ishaan bought 4 balls and a lunch box for ₹250 in all. Each ball cost the same. What did one ball cost? (a) ₹62 (b) not enough info (c) ₹250 (d) ₹246
19. 19.🧩 Diya bought 4 kites and a bag for ₹80 in all. Each kite cost the same. What did one kite cost? (a) ₹20 (b) ₹76 (c) not enough info (d) ₹80
20. 20.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
21. 21.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
22. 22.🧩 Diya bought 4 kites and a cap for ₹100 in all. Each kite cost the same. What did one kite cost? (a) ₹100 (b) ₹96 (c) not enough info (d) ₹25
23. 23.🧩 Arjun is 12 years old. Tara is 5 years older than Arjun. How old is Tara? (a) not enough info (b) 18 (c) 5 (d) 17
24. 24.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) False (b) True
25. 25.🧩 The film starts at 6 PM and lasts 2 hours. When does it end? (a) 8 PM (b) 6 PM (c) 9 PM (d) not enough info
26. 26.🧩 Rohan is 10 years old. Ishaan is 9 years older than Rohan. How old is Ishaan? (a) not enough info (b) 20 (c) 19 (d) 9
27. 27.🧩 The film starts at 4 PM and lasts 2 hours. When does it end? (a) 4 PM (b) 7 PM (c) 6 PM (d) not enough info
28. 28.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
29. 29.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) False (b) True
30. 30.🧩 A box of eggs has 4 in each row. How many eggs are in the box? (a) 4 (b) 8 (c) 40 (d) not enough info
31. 31.🧩 Vihaan bought 5 kites for ₹125 in all. Each kite cost the same. What did one kite cost? (a) ₹30 (b) not enough info (c) ₹125 (d) ₹25
32. 32.🧩 Diya is 6 years old. Arjun is older than Diya. How old is Arjun? (a) not enough info (b) 8 (c) 7 (d) 11
33. 33.🧩 Rohan bought 2 mangoes for ₹60 in all. Each mango cost the same. What did one mango cost? (a) ₹35 (b) ₹30 (c) ₹60 (d) not enough info
34. 34.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) guessing (c) asking your pet (d) asking the whole class
35. 35.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
36. 36.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) enough evidence (b) not enough evidence
37. 37.🧩 Diya bought 3 pens and a water bottle for ₹210 in all. Each pen cost the same. What did one pen cost? (a) ₹207 (b) ₹70 (c) not enough info (d) ₹210
38. 38.🧩 Saanvi bought 2 markers for ₹40 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹40 (c) ₹20 (d) ₹25
39. 39.🧩 Tara is 11 years old. Saanvi is older than Tara. How old is Saanvi? (a) 13 (b) not enough info (c) 16 (d) 12
40. 40.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence

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