Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 453 · 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.🧩 Diya bought 6 notebooks for ₹90 in all. Each notebook cost the same. What did one notebook cost? (a) ₹20 (b) ₹90 (c) not enough info (d) ₹15
2. 2.🧩 Vihaan bought 3 notebooks for ₹180 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹60 (c) ₹180 (d) ₹65
3. 3.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) yes, mangoes match (b) no, check more (c) yes, it is certain (d) no mango is sweet
4. 4.🧩 Aarav is 12 years old. Nisha is 8 years older than Aarav. How old is Nisha? (a) 21 (b) not enough info (c) 8 (d) 20
5. 5.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
6. 6.🧩 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
7. 7.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
8. 8.🧩 Meera is 12 years old. Tara is older than Meera. How old is Tara? (a) 14 (b) 17 (c) 13 (d) not enough info
9. 9.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
10. 10.🧩 Before solving a word problem, first check… (a) the colour of ink (b) what facts are given (c) the page number (d) your handwriting
11. 11.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
12. 12.🧩 Nisha is 10 years old. Kabir is 2 years older than Nisha. How old is Kabir? (a) 2 (b) not enough info (c) 13 (d) 12
13. 13.🐕 One dog barked at you. What is the fair conclusion? (a) that one dog barked (b) dogs hate you (c) all dogs are mean (d) never see dogs
14. 14.📊 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
15. 15.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
16. 16.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
17. 17.🧩 Meera is 7 years old. Rohan is older than Meera. How old is Rohan? (a) 9 (b) not enough info (c) 12 (d) 8
18. 18.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 4 PM (b) 5 PM (c) 3 PM (d) not enough info
19. 19.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
20. 20.🧩 Meera is 12 years old. Saanvi is older than Meera. How old is Saanvi? (a) 13 (b) 14 (c) 17 (d) not enough info
21. 21.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
22. 22.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
23. 23.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
24. 24.🧩 Rohan is 8 years old. Aarav is 4 years older than Rohan. How old is Aarav? (a) not enough info (b) 4 (c) 13 (d) 12
25. 25.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
26. 26.🧩 Aarav is 8 years old. Saanvi is 2 years older than Aarav. How old is Saanvi? (a) 2 (b) 11 (c) not enough info (d) 10
27. 27.🧩 Diya is 9 years old. Tara is 8 years older than Diya. How old is Tara? (a) not enough info (b) 18 (c) 8 (d) 17
28. 28.🧩 Nisha bought 2 pens for ₹40 in all. Each pen cost the same. What did one pen cost? (a) ₹40 (b) ₹25 (c) not enough info (d) ₹20
29. 29.🧩 Meera bought 3 balls and a bag for ₹125 in all. Each ball cost the same. What did one ball cost? (a) ₹41 (b) not enough info (c) ₹122 (d) ₹125
30. 30.🧩 Aarav is 6 years old. Saanvi is older than Aarav. How old is Saanvi? (a) 11 (b) 7 (c) 8 (d) not enough info
31. 31.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
32. 32.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) not enough info (b) 6 PM (c) 7 PM (d) 5 PM
33. 33.🧩 A box of eggs has 7 in each row. How many eggs are in the box? (a) 70 (b) 14 (c) not enough info (d) 7
34. 34.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to change answers (c) to waste time (d) to be sure of results
35. 35.🧩 Aarav bought 3 balls for ₹75 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹75 (c) ₹25 (d) ₹30
36. 36.🧩 Kabir is 7 years old. Meera is 5 years older than Kabir. How old is Meera? (a) 5 (b) 13 (c) not enough info (d) 12
37. 37.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
38. 38.🧩 Ananya bought 2 pens and a water bottle for ₹130 in all. Each pen cost the same. What did one pen cost? (a) ₹130 (b) ₹65 (c) ₹128 (d) not enough info
39. 39.🧩 Ananya is 7 years old. Tara is older than Ananya. How old is Tara? (a) 12 (b) 8 (c) not enough info (d) 9
40. 40.🧩 Aarav bought 4 markers and a bag for ₹240 in all. Each marker cost the same. What did one marker cost? (a) ₹236 (b) not enough info (c) ₹60 (d) ₹240

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