Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 472 · 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 tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
2. 2.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) False (b) True
3. 3.🧩 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
4. 4.🧩 Before solving a word problem, first check… (a) your handwriting (b) the page number (c) the colour of ink (d) what facts are given
5. 5.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
6. 6.🧩 Rohan bought 6 markers and a water bottle for ₹210 in all. Each marker cost the same. What did one marker cost? (a) ₹210 (b) not enough info (c) ₹35 (d) ₹204
7. 7.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
8. 8.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 7 PM (b) not enough info (c) 6 PM (d) 5 PM
9. 9.🧩 Kabir bought 5 pens for ₹200 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹45 (c) ₹200 (d) ₹40
10. 10.🧩 Saanvi is 9 years old. Rohan is 3 years older than Saanvi. How old is Rohan? (a) 3 (b) 13 (c) 12 (d) not enough info
11. 11.🧩 Rohan is 8 years old. Meera is older than Rohan. How old is Meera? (a) 10 (b) 9 (c) not enough info (d) 13
12. 12.🧩 Saanvi is 7 years old. Arjun is 6 years older than Saanvi. How old is Arjun? (a) 13 (b) 6 (c) not enough info (d) 14
13. 13.🧩 Tara bought 3 markers for ₹105 in all. Each marker cost the same. What did one marker cost? (a) ₹105 (b) ₹40 (c) not enough info (d) ₹35
14. 14.🧩 Aarav bought 2 pens for ₹30 in all. Each pen cost the same. What did one pen cost? (a) ₹15 (b) not enough info (c) ₹30 (d) ₹20
15. 15.🧩 A box has 5 rows of mangoes, with 6 in each row. How many mangoes are in the box? (a) 30 (b) 11 (c) not enough info (d) 36
16. 16.🧩 Vihaan bought 6 notebooks for ₹90 in all. Each notebook cost the same. What did one notebook cost? (a) ₹20 (b) ₹15 (c) ₹90 (d) not enough info
17. 17.🧩 Saanvi bought 2 kites and a water bottle for ₹90 in all. Each kite cost the same. What did one kite cost? (a) ₹90 (b) ₹88 (c) ₹45 (d) not enough info
18. 18.🧩 A box has 4 rows of mangoes, with 8 in each row. How many mangoes are in the box? (a) 32 (b) 12 (c) 40 (d) not enough info
19. 19.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking one friend (c) asking your pet (d) asking the whole class
20. 20.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
21. 21.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
22. 22.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to change answers (c) for fun only (d) to be sure of results
23. 23.🧩 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
24. 24.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
25. 25.🧩 Meera is 11 years old. Rohan is older than Meera. How old is Rohan? (a) not enough info (b) 12 (c) 16 (d) 13
26. 26.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
27. 27.🧩 A box has 4 rows of mangoes, with 4 in each row. How many mangoes are in the box? (a) 20 (b) 16 (c) not enough info (d) 8
28. 28.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no, check more (b) no mango is sweet (c) yes, it is certain (d) yes, mangoes match
29. 29.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
30. 30.🧩 Ishaan is 8 years old. Diya is 3 years older than Ishaan. How old is Diya? (a) 12 (b) 3 (c) not enough info (d) 11
31. 31.🧩 Saanvi is 6 years old. Ananya is older than Saanvi. How old is Ananya? (a) 8 (b) 7 (c) not enough info (d) 11
32. 32.🧩 Ishaan bought 3 mangoes and a lunch box for ₹100 in all. Each mango cost the same. What did one mango cost? (a) ₹97 (b) ₹100 (c) ₹33 (d) not enough info
33. 33.🧩 Meera bought 4 markers for ₹220 in all. Each marker cost the same. What did one marker cost? (a) ₹55 (b) not enough info (c) ₹60 (d) ₹220
34. 34.🧩 A box of guavas has 9 in each row. How many guavas are in the box? (a) 18 (b) 90 (c) 9 (d) not enough info
35. 35.🧩 A box of eggs has 5 in each row. How many eggs are in the box? (a) 50 (b) not enough info (c) 5 (d) 10
36. 36.🧩 A box has 5 rows of apples, with 4 in each row. How many apples are in the box? (a) 9 (b) 24 (c) not enough info (d) 20
37. 37.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
38. 38.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) False (b) True
39. 39.🧩 A box has 8 rows of eggs, with 4 in each row. How many eggs are in the box? (a) 12 (b) 36 (c) 32 (d) not enough info
40. 40.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence

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